1 /* 2 * soc-compress.c -- ALSA SoC Compress 3 * 4 * Copyright (C) 2012 Intel Corp. 5 * 6 * Authors: Namarta Kohli <namartax.kohli@intel.com> 7 * Ramesh Babu K V <ramesh.babu@linux.intel.com> 8 * Vinod Koul <vinod.koul@linux.intel.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/init.h> 19 #include <linux/delay.h> 20 #include <linux/slab.h> 21 #include <linux/workqueue.h> 22 #include <sound/core.h> 23 #include <sound/compress_params.h> 24 #include <sound/compress_driver.h> 25 #include <sound/soc.h> 26 #include <sound/initval.h> 27 #include <sound/soc-dpcm.h> 28 29 static int soc_compr_open(struct snd_compr_stream *cstream) 30 { 31 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 32 struct snd_soc_platform *platform = rtd->platform; 33 int ret = 0; 34 35 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 36 37 if (platform->driver->compr_ops && platform->driver->compr_ops->open) { 38 ret = platform->driver->compr_ops->open(cstream); 39 if (ret < 0) { 40 pr_err("compress asoc: can't open platform %s\n", 41 platform->component.name); 42 goto out; 43 } 44 } 45 46 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) { 47 ret = rtd->dai_link->compr_ops->startup(cstream); 48 if (ret < 0) { 49 pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name); 50 goto machine_err; 51 } 52 } 53 54 snd_soc_runtime_activate(rtd, cstream->direction); 55 56 mutex_unlock(&rtd->pcm_mutex); 57 58 return 0; 59 60 machine_err: 61 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 62 platform->driver->compr_ops->free(cstream); 63 out: 64 mutex_unlock(&rtd->pcm_mutex); 65 return ret; 66 } 67 68 static int soc_compr_open_fe(struct snd_compr_stream *cstream) 69 { 70 struct snd_soc_pcm_runtime *fe = cstream->private_data; 71 struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream; 72 struct snd_soc_platform *platform = fe->platform; 73 struct snd_soc_dpcm *dpcm; 74 struct snd_soc_dapm_widget_list *list; 75 int stream; 76 int ret = 0; 77 78 if (cstream->direction == SND_COMPRESS_PLAYBACK) 79 stream = SNDRV_PCM_STREAM_PLAYBACK; 80 else 81 stream = SNDRV_PCM_STREAM_CAPTURE; 82 83 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 84 85 if (platform->driver->compr_ops && platform->driver->compr_ops->open) { 86 ret = platform->driver->compr_ops->open(cstream); 87 if (ret < 0) { 88 pr_err("compress asoc: can't open platform %s\n", 89 platform->component.name); 90 goto out; 91 } 92 } 93 94 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) { 95 ret = fe->dai_link->compr_ops->startup(cstream); 96 if (ret < 0) { 97 pr_err("compress asoc: %s startup failed\n", fe->dai_link->name); 98 goto machine_err; 99 } 100 } 101 102 fe->dpcm[stream].runtime = fe_substream->runtime; 103 104 ret = dpcm_path_get(fe, stream, &list); 105 if (ret < 0) 106 goto fe_err; 107 else if (ret == 0) 108 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", 109 fe->dai_link->name, stream ? "capture" : "playback"); 110 111 /* calculate valid and active FE <-> BE dpcms */ 112 dpcm_process_paths(fe, stream, &list, 1); 113 114 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 115 116 ret = dpcm_be_dai_startup(fe, stream); 117 if (ret < 0) { 118 /* clean up all links */ 119 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 120 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 121 122 dpcm_be_disconnect(fe, stream); 123 fe->dpcm[stream].runtime = NULL; 124 goto path_err; 125 } 126 127 dpcm_clear_pending_state(fe, stream); 128 dpcm_path_put(&list); 129 130 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 131 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 132 133 snd_soc_runtime_activate(fe, stream); 134 135 mutex_unlock(&fe->card->mutex); 136 137 return 0; 138 139 path_err: 140 dpcm_path_put(&list); 141 fe_err: 142 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown) 143 fe->dai_link->compr_ops->shutdown(cstream); 144 machine_err: 145 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 146 platform->driver->compr_ops->free(cstream); 147 out: 148 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 149 mutex_unlock(&fe->card->mutex); 150 return ret; 151 } 152 153 /* 154 * Power down the audio subsystem pmdown_time msecs after close is called. 155 * This is to ensure there are no pops or clicks in between any music tracks 156 * due to DAPM power cycling. 157 */ 158 static void close_delayed_work(struct work_struct *work) 159 { 160 struct snd_soc_pcm_runtime *rtd = 161 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); 162 struct snd_soc_dai *codec_dai = rtd->codec_dai; 163 164 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 165 166 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", 167 codec_dai->driver->playback.stream_name, 168 codec_dai->playback_active ? "active" : "inactive", 169 rtd->pop_wait ? "yes" : "no"); 170 171 /* are we waiting on this codec DAI stream */ 172 if (rtd->pop_wait == 1) { 173 rtd->pop_wait = 0; 174 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 175 SND_SOC_DAPM_STREAM_STOP); 176 } 177 178 mutex_unlock(&rtd->pcm_mutex); 179 } 180 181 static int soc_compr_free(struct snd_compr_stream *cstream) 182 { 183 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 184 struct snd_soc_platform *platform = rtd->platform; 185 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 186 struct snd_soc_dai *codec_dai = rtd->codec_dai; 187 int stream; 188 189 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 190 191 if (cstream->direction == SND_COMPRESS_PLAYBACK) 192 stream = SNDRV_PCM_STREAM_PLAYBACK; 193 else 194 stream = SNDRV_PCM_STREAM_CAPTURE; 195 196 snd_soc_runtime_deactivate(rtd, stream); 197 198 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); 199 200 if (!cpu_dai->active) 201 cpu_dai->rate = 0; 202 203 if (!codec_dai->active) 204 codec_dai->rate = 0; 205 206 207 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown) 208 rtd->dai_link->compr_ops->shutdown(cstream); 209 210 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 211 platform->driver->compr_ops->free(cstream); 212 213 if (cstream->direction == SND_COMPRESS_PLAYBACK) { 214 if (snd_soc_runtime_ignore_pmdown_time(rtd)) { 215 snd_soc_dapm_stream_event(rtd, 216 SNDRV_PCM_STREAM_PLAYBACK, 217 SND_SOC_DAPM_STREAM_STOP); 218 } else { 219 rtd->pop_wait = 1; 220 queue_delayed_work(system_power_efficient_wq, 221 &rtd->delayed_work, 222 msecs_to_jiffies(rtd->pmdown_time)); 223 } 224 } else { 225 /* capture streams can be powered down now */ 226 snd_soc_dapm_stream_event(rtd, 227 SNDRV_PCM_STREAM_CAPTURE, 228 SND_SOC_DAPM_STREAM_STOP); 229 } 230 231 mutex_unlock(&rtd->pcm_mutex); 232 return 0; 233 } 234 235 static int soc_compr_free_fe(struct snd_compr_stream *cstream) 236 { 237 struct snd_soc_pcm_runtime *fe = cstream->private_data; 238 struct snd_soc_platform *platform = fe->platform; 239 struct snd_soc_dpcm *dpcm; 240 int stream, ret; 241 242 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 243 244 if (cstream->direction == SND_COMPRESS_PLAYBACK) 245 stream = SNDRV_PCM_STREAM_PLAYBACK; 246 else 247 stream = SNDRV_PCM_STREAM_CAPTURE; 248 249 snd_soc_runtime_deactivate(fe, stream); 250 251 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 252 253 ret = dpcm_be_dai_hw_free(fe, stream); 254 if (ret < 0) 255 dev_err(fe->dev, "compressed hw_free failed %d\n", ret); 256 257 ret = dpcm_be_dai_shutdown(fe, stream); 258 259 /* mark FE's links ready to prune */ 260 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) 261 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 262 263 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 264 265 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 266 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 267 268 dpcm_be_disconnect(fe, stream); 269 270 fe->dpcm[stream].runtime = NULL; 271 272 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown) 273 fe->dai_link->compr_ops->shutdown(cstream); 274 275 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 276 platform->driver->compr_ops->free(cstream); 277 278 mutex_unlock(&fe->card->mutex); 279 return 0; 280 } 281 282 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd) 283 { 284 285 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 286 struct snd_soc_platform *platform = rtd->platform; 287 struct snd_soc_dai *codec_dai = rtd->codec_dai; 288 int ret = 0; 289 290 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 291 292 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { 293 ret = platform->driver->compr_ops->trigger(cstream, cmd); 294 if (ret < 0) 295 goto out; 296 } 297 298 switch (cmd) { 299 case SNDRV_PCM_TRIGGER_START: 300 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction); 301 break; 302 case SNDRV_PCM_TRIGGER_STOP: 303 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); 304 break; 305 } 306 307 out: 308 mutex_unlock(&rtd->pcm_mutex); 309 return ret; 310 } 311 312 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd) 313 { 314 struct snd_soc_pcm_runtime *fe = cstream->private_data; 315 struct snd_soc_platform *platform = fe->platform; 316 int ret = 0, stream; 317 318 if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN || 319 cmd == SND_COMPR_TRIGGER_DRAIN) { 320 321 if (platform->driver->compr_ops && 322 platform->driver->compr_ops->trigger) 323 return platform->driver->compr_ops->trigger(cstream, 324 cmd); 325 } 326 327 if (cstream->direction == SND_COMPRESS_PLAYBACK) 328 stream = SNDRV_PCM_STREAM_PLAYBACK; 329 else 330 stream = SNDRV_PCM_STREAM_CAPTURE; 331 332 333 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 334 335 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { 336 ret = platform->driver->compr_ops->trigger(cstream, cmd); 337 if (ret < 0) 338 goto out; 339 } 340 341 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 342 343 ret = dpcm_be_dai_trigger(fe, stream, cmd); 344 345 switch (cmd) { 346 case SNDRV_PCM_TRIGGER_START: 347 case SNDRV_PCM_TRIGGER_RESUME: 348 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 349 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 350 break; 351 case SNDRV_PCM_TRIGGER_STOP: 352 case SNDRV_PCM_TRIGGER_SUSPEND: 353 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 354 break; 355 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 356 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 357 break; 358 } 359 360 out: 361 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 362 mutex_unlock(&fe->card->mutex); 363 return ret; 364 } 365 366 static int soc_compr_set_params(struct snd_compr_stream *cstream, 367 struct snd_compr_params *params) 368 { 369 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 370 struct snd_soc_platform *platform = rtd->platform; 371 int ret = 0; 372 373 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 374 375 /* first we call set_params for the platform driver 376 * this should configure the soc side 377 * if the machine has compressed ops then we call that as well 378 * expectation is that platform and machine will configure everything 379 * for this compress path, like configuring pcm port for codec 380 */ 381 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { 382 ret = platform->driver->compr_ops->set_params(cstream, params); 383 if (ret < 0) 384 goto err; 385 } 386 387 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) { 388 ret = rtd->dai_link->compr_ops->set_params(cstream); 389 if (ret < 0) 390 goto err; 391 } 392 393 if (cstream->direction == SND_COMPRESS_PLAYBACK) 394 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 395 SND_SOC_DAPM_STREAM_START); 396 else 397 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 398 SND_SOC_DAPM_STREAM_START); 399 400 /* cancel any delayed stream shutdown that is pending */ 401 rtd->pop_wait = 0; 402 mutex_unlock(&rtd->pcm_mutex); 403 404 cancel_delayed_work_sync(&rtd->delayed_work); 405 406 return ret; 407 408 err: 409 mutex_unlock(&rtd->pcm_mutex); 410 return ret; 411 } 412 413 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream, 414 struct snd_compr_params *params) 415 { 416 struct snd_soc_pcm_runtime *fe = cstream->private_data; 417 struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream; 418 struct snd_soc_platform *platform = fe->platform; 419 int ret = 0, stream; 420 421 if (cstream->direction == SND_COMPRESS_PLAYBACK) 422 stream = SNDRV_PCM_STREAM_PLAYBACK; 423 else 424 stream = SNDRV_PCM_STREAM_CAPTURE; 425 426 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 427 428 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { 429 ret = platform->driver->compr_ops->set_params(cstream, params); 430 if (ret < 0) 431 goto out; 432 } 433 434 if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) { 435 ret = fe->dai_link->compr_ops->set_params(cstream); 436 if (ret < 0) 437 goto out; 438 } 439 440 /* 441 * Create an empty hw_params for the BE as the machine driver must 442 * fix this up to match DSP decoder and ASRC configuration. 443 * I.e. machine driver fixup for compressed BE is mandatory. 444 */ 445 memset(&fe->dpcm[fe_substream->stream].hw_params, 0, 446 sizeof(struct snd_pcm_hw_params)); 447 448 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 449 450 ret = dpcm_be_dai_hw_params(fe, stream); 451 if (ret < 0) 452 goto out; 453 454 ret = dpcm_be_dai_prepare(fe, stream); 455 if (ret < 0) 456 goto out; 457 458 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); 459 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 460 461 out: 462 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 463 mutex_unlock(&fe->card->mutex); 464 return ret; 465 } 466 467 static int soc_compr_get_params(struct snd_compr_stream *cstream, 468 struct snd_codec *params) 469 { 470 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 471 struct snd_soc_platform *platform = rtd->platform; 472 int ret = 0; 473 474 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 475 476 if (platform->driver->compr_ops && platform->driver->compr_ops->get_params) 477 ret = platform->driver->compr_ops->get_params(cstream, params); 478 479 mutex_unlock(&rtd->pcm_mutex); 480 return ret; 481 } 482 483 static int soc_compr_get_caps(struct snd_compr_stream *cstream, 484 struct snd_compr_caps *caps) 485 { 486 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 487 struct snd_soc_platform *platform = rtd->platform; 488 int ret = 0; 489 490 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 491 492 if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps) 493 ret = platform->driver->compr_ops->get_caps(cstream, caps); 494 495 mutex_unlock(&rtd->pcm_mutex); 496 return ret; 497 } 498 499 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream, 500 struct snd_compr_codec_caps *codec) 501 { 502 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 503 struct snd_soc_platform *platform = rtd->platform; 504 int ret = 0; 505 506 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 507 508 if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps) 509 ret = platform->driver->compr_ops->get_codec_caps(cstream, codec); 510 511 mutex_unlock(&rtd->pcm_mutex); 512 return ret; 513 } 514 515 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes) 516 { 517 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 518 struct snd_soc_platform *platform = rtd->platform; 519 int ret = 0; 520 521 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 522 523 if (platform->driver->compr_ops && platform->driver->compr_ops->ack) 524 ret = platform->driver->compr_ops->ack(cstream, bytes); 525 526 mutex_unlock(&rtd->pcm_mutex); 527 return ret; 528 } 529 530 static int soc_compr_pointer(struct snd_compr_stream *cstream, 531 struct snd_compr_tstamp *tstamp) 532 { 533 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 534 struct snd_soc_platform *platform = rtd->platform; 535 int ret = 0; 536 537 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 538 539 if (platform->driver->compr_ops && platform->driver->compr_ops->pointer) 540 ret = platform->driver->compr_ops->pointer(cstream, tstamp); 541 542 mutex_unlock(&rtd->pcm_mutex); 543 return ret; 544 } 545 546 static int soc_compr_copy(struct snd_compr_stream *cstream, 547 char __user *buf, size_t count) 548 { 549 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 550 struct snd_soc_platform *platform = rtd->platform; 551 int ret = 0; 552 553 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 554 555 if (platform->driver->compr_ops && platform->driver->compr_ops->copy) 556 ret = platform->driver->compr_ops->copy(cstream, buf, count); 557 558 mutex_unlock(&rtd->pcm_mutex); 559 return ret; 560 } 561 562 static int soc_compr_set_metadata(struct snd_compr_stream *cstream, 563 struct snd_compr_metadata *metadata) 564 { 565 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 566 struct snd_soc_platform *platform = rtd->platform; 567 int ret = 0; 568 569 if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata) 570 ret = platform->driver->compr_ops->set_metadata(cstream, metadata); 571 572 return ret; 573 } 574 575 static int soc_compr_get_metadata(struct snd_compr_stream *cstream, 576 struct snd_compr_metadata *metadata) 577 { 578 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 579 struct snd_soc_platform *platform = rtd->platform; 580 int ret = 0; 581 582 if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata) 583 ret = platform->driver->compr_ops->get_metadata(cstream, metadata); 584 585 return ret; 586 } 587 588 /* ASoC Compress operations */ 589 static struct snd_compr_ops soc_compr_ops = { 590 .open = soc_compr_open, 591 .free = soc_compr_free, 592 .set_params = soc_compr_set_params, 593 .set_metadata = soc_compr_set_metadata, 594 .get_metadata = soc_compr_get_metadata, 595 .get_params = soc_compr_get_params, 596 .trigger = soc_compr_trigger, 597 .pointer = soc_compr_pointer, 598 .ack = soc_compr_ack, 599 .get_caps = soc_compr_get_caps, 600 .get_codec_caps = soc_compr_get_codec_caps 601 }; 602 603 /* ASoC Dynamic Compress operations */ 604 static struct snd_compr_ops soc_compr_dyn_ops = { 605 .open = soc_compr_open_fe, 606 .free = soc_compr_free_fe, 607 .set_params = soc_compr_set_params_fe, 608 .get_params = soc_compr_get_params, 609 .set_metadata = soc_compr_set_metadata, 610 .get_metadata = soc_compr_get_metadata, 611 .trigger = soc_compr_trigger_fe, 612 .pointer = soc_compr_pointer, 613 .ack = soc_compr_ack, 614 .get_caps = soc_compr_get_caps, 615 .get_codec_caps = soc_compr_get_codec_caps 616 }; 617 618 /** 619 * snd_soc_new_compress - create a new compress. 620 * 621 * @rtd: The runtime for which we will create compress 622 * @num: the device index number (zero based - shared with normal PCMs) 623 * 624 * Return: 0 for success, else error. 625 */ 626 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) 627 { 628 struct snd_soc_codec *codec = rtd->codec; 629 struct snd_soc_platform *platform = rtd->platform; 630 struct snd_soc_dai *codec_dai = rtd->codec_dai; 631 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 632 struct snd_compr *compr; 633 struct snd_pcm *be_pcm; 634 char new_name[64]; 635 int ret = 0, direction = 0; 636 int playback = 0, capture = 0; 637 638 if (rtd->num_codecs > 1) { 639 dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n"); 640 return -EINVAL; 641 } 642 643 /* check client and interface hw capabilities */ 644 snprintf(new_name, sizeof(new_name), "%s %s-%d", 645 rtd->dai_link->stream_name, codec_dai->name, num); 646 647 if (codec_dai->driver->playback.channels_min) 648 playback = 1; 649 if (codec_dai->driver->capture.channels_min) 650 capture = 1; 651 652 capture = capture && cpu_dai->driver->capture.channels_min; 653 playback = playback && cpu_dai->driver->playback.channels_min; 654 655 /* 656 * Compress devices are unidirectional so only one of the directions 657 * should be set, check for that (xor) 658 */ 659 if (playback + capture != 1) { 660 dev_err(rtd->card->dev, "Invalid direction for compress P %d, C %d\n", 661 playback, capture); 662 return -EINVAL; 663 } 664 665 if(playback) 666 direction = SND_COMPRESS_PLAYBACK; 667 else 668 direction = SND_COMPRESS_CAPTURE; 669 670 compr = kzalloc(sizeof(*compr), GFP_KERNEL); 671 if (compr == NULL) { 672 snd_printk(KERN_ERR "Cannot allocate compr\n"); 673 return -ENOMEM; 674 } 675 676 compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops), 677 GFP_KERNEL); 678 if (compr->ops == NULL) { 679 dev_err(rtd->card->dev, "Cannot allocate compressed ops\n"); 680 ret = -ENOMEM; 681 goto compr_err; 682 } 683 684 if (rtd->dai_link->dynamic) { 685 snprintf(new_name, sizeof(new_name), "(%s)", 686 rtd->dai_link->stream_name); 687 688 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 689 rtd->dai_link->dpcm_playback, 690 rtd->dai_link->dpcm_capture, &be_pcm); 691 if (ret < 0) { 692 dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n", 693 rtd->dai_link->name); 694 goto compr_err; 695 } 696 697 rtd->pcm = be_pcm; 698 rtd->fe_compr = 1; 699 if (rtd->dai_link->dpcm_playback) 700 be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 701 else if (rtd->dai_link->dpcm_capture) 702 be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 703 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops)); 704 } else 705 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops)); 706 707 /* Add copy callback for not memory mapped DSPs */ 708 if (platform->driver->compr_ops && platform->driver->compr_ops->copy) 709 compr->ops->copy = soc_compr_copy; 710 711 mutex_init(&compr->lock); 712 713 snprintf(new_name, sizeof(new_name), "%s %s-%d", 714 rtd->dai_link->stream_name, 715 rtd->codec_dai->name, num); 716 717 ret = snd_compress_new(rtd->card->snd_card, num, direction, 718 new_name, compr); 719 if (ret < 0) { 720 pr_err("compress asoc: can't create compress for codec %s\n", 721 codec->component.name); 722 goto compr_err; 723 } 724 725 /* DAPM dai link stream work */ 726 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 727 728 rtd->compr = compr; 729 compr->private_data = rtd; 730 731 printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name, 732 cpu_dai->name); 733 return ret; 734 735 compr_err: 736 kfree(compr); 737 return ret; 738 } 739 EXPORT_SYMBOL_GPL(snd_soc_new_compress); 740